Apparatus for tightening leakages in and about boiler-tubes and the like



J. M. JOHANSEN.- APPARATUS FOR TIGHTENING LEAKAGES IN AND ABOUT BOILERTUBES AND THE LIKE.

25, 1921. 2 SHEETS-SHEET x.

I. M. JOHANSEN. APPARATUS FOR TIGHTENING LEAKAGES IN AND ABOUT BOILERTUBES AND THE LIKE.

APPLICATION FILED JAN. 12, 1920.

1,395,186, Patented Oct. 25, 1921.

2 SHEETS-SHEET 2.

I N H fi llll UNITED STATES PATENT OFFlfiE.

JOHAN MARIUS JOHANESEN, OF TRONDHJEBI, NORWAY.

APPARATUS FOR TIGHTENING LEAKAGES I AND ABOUT BOILER-TUBES AND THE LIKE.

Specification of Letters Patent.

Patented Oct. 25, 1921 Application filed January 12, 1920. Serial No.350,774.

T 0 all whom it may concern:

Be it known that I, JOHAN MAnIUs JOHANSEN, a subject of the King ofNorway, residing at Trondhjem, Norway, have invented certain new anduseful Improvements in Apparatus for Tightening Leakages in and AboutBoiler-Tubes and the like 5 and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part ofthis specification.

The present invention has for its object to provide a device for mendingleakages in and about boiler tubes, etc., and comprises a tighteningplug consisting of two parts hinged together, said tightening plug, whenthe parts are put together, fitting tightly into or about the opening ofthe boiler tube. One part of said tightening plug is pivotally mountedat the front end of a bar adapted to be pushed through the boiler tube,and the other half of the plug is hinged to the said first half at itscircumference so as to swing about an axis of the plug.

In the accompanying drawings,

Figure 1 is an axial section through the boiler tube with the tighteningapparatus inside the same.

Fig. 2 is an axial section through the end of a boiler tube with thetightening apparatus pushed farther forward so that the tightening plugis free outside the tube.

Fig. 3 is a similar section illustrating the apparatus in position fortightening.

Fig. 4 is a cross-section through a tube seen in the direction of theplug which is turned 90 from the position indicated on Fig. 2.

Fig. 5 illustrates a modified form of the invention.

The plug shown in Figs. 1 to 4 consists of two parts A, A each havingthe form of substantially a quadrant of a sphere, the two parts beingconnected together by a hinge P so that they may be folded together toform substantially a semi-spherical body. The plane opposing face ofeach part is cut away at a to form a recess to receive one end of a rodC. This rod is adapted to extend through a boiler tube as K and the partA of the plug is pivotally mounted on a trunnion E, two of which areformed on one end of said rod and extend at right angles to the axisthereof.

The two parts A, it. when being introduced into a tube K, extend alongone side of the rod C as shown in Fig. 1, and when said parts passthrough the end of the tube they swing into the position shown in Fig. 2aided by the action of a spring I on nected at opposite ends to the rodU and the part A. Further, swinging of the parts by the action of thespring is arrested by a shoulder S on the rod engaging an offset on thepart A.

By rotating the rod C counter clockwise 180 2'. c. in the direction ofthe arrows G (Figs. 2 and i) the plane face of part A of the plug willfold against the plane face of part A and form a substantiallysemispherical plug as shown in Fig. i.

The part A has a cylindrical recess a. into which the second trunnion Eextends when the parts are folded together. Both parts have a beveledflange B adapted to fit around the end of the tube as shown in Fig. 3.In this position the plug tightens the end of the boiler tube, and bar 0is kept in position by means of nut and thread (not shown) on its 0posite free end. N ear'the front end the bar is provided with a bracket Lfor keeping it approximately in the center of the boiler tube. Aprojecting rib N is provided on the part A of the plug for keeping theplug members in position relatively to each other. The surfaces M alongwhich the two plug halves are in touch with each other, are providedwith a layer of cement or the like for keeping the connection tight.

In the modification of the invention illustrated on Fig. 5 the spring Iand the collar B are left out. The tightening plug is conical and in itsassembled position fits into the tube with its narrow end. When bar C isdrawn into the tube, the conical plug is caused to exert an outwardlydirected pressure on the tube end, whereby the connection between thesame and the boiler plate is tightened, and at the same time the tubeend is tightened in case there should be a leakage somewhere on thetube. The apparatus is introduced through the position indicated indotted lines, and after having been pushed entirely through the tube,the bar is rotated, whereby the outward half of the plug is pivoted onits hinge and is brought together with the innermost plug half. In orderto secure'correct position of the plug halves with regard to the bar 0,the outward half of the plug is provided with a recess adapted to fitabout the front end of bar C and the projecting end of trunnion E.

1. In an apparatus for tightening leakages and the light, a tighteningplug, consisting of two halves, one hall of the tight ening plug beingpivotally mounted at the front end of a bar, adapted to be introducedthrough a boiler tube, while the other half of the plug is hinged at itscircumference to the first mentioned half of the plug.

2. In an apparatus for tightening leakages and the like a conicaltightening plug, consisting of two halves, one half of the tighteningplug being pivotally mounted at the front end of a bar, adapted to beintroduced through a boiler tube, while the other half of the plug ishinged at its circumfer- "ence to the first mentioned half of the plug.

8. In an apparatus for tightening leakages and the like a tighteningplug, consisting of two halves, one half of the tightening plug beingpivotally mounted at the front end of a bar, adapted to be introducedthrough a boiler tube, while the other half of the plug is hinged at itscircumference to the first mentioned half of the plug, the plug beingprovided with a collar or flange adapted to fit round the end-opening ofa boiler tube.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribin witnesses.

JOHAN 'MARIUS foHANsEN.

Witnesses BJARNE OWRE, YNGVOR KIEL.

